Article 53.
Peace Treaties, Trade agreements, treaties or agreements relating to international organization, those committing the finances of the State, those modifying provisions which are the preserve of statute law, those relating to the status of persons, and those involving the ceding, exchanging or acquiring of territory, may be ratified or approved only by an Act of Parliament.
They shall not take effect until such ratification or approval has been secured.
No ceding, exchanging or acquiring of territory shall be valid without the consent of the population concerned.